Oil burner



R. M. SOPER OIL BURNER Feb. 21, 1933.

Filed Aug. 16, 1929 ATTORNEY Patented Feb. 21, 1933 warren STATES ROY M. SOIEER, OF KANSAS CITY, MISSOURI OIL BURNER I Application filed August 16. 1929. Serial No. 386,284.

My invention relates to oil burners, and has for its principal objects to promote vaporization of liquid fuel while the same is moving toward the fuel inlet nozzle, to increase the extent of exposure of fluid fuel to the heat of a burner while the same is in use, and to facilitate the construotionand assembly of a burner adapted to generate gas from liquid fuel. Further particular objects of 19 the invention are to provide for removal and replacement of a vaporizing chamber, and to combine fluid conduits and a VttPOIlZ ing chamber in a single replaceable unit.

In accomplishing these andother objects of the invention, I have provided improved details of structure, the preferred forms of which are illustrated in the accompanying drawing, wherein; a r

Fig. 1 is a longitudinal central section of an oil burner constructed in accordance with my invention. I r

Fig. 2 is a section on the line 22, Fig. 1.

Fig. 8 is a perspective view of an annular vaporizing chamber and portions of pipes 5 connected therewith for conducting fluid fuel to and from the chamber.

Fig. 4 is a perspective view of the burner, illustrating a shield in retracted position, the housing wall being partly broken away to better show the position of the vaporizing chamber.

Referring in detail to the drawing:

1 designates a housing comprising preferably an elongated cylindrical shell or body, one end of which is open and the otherend closed by a wall 2 having an axial gas intake opening 3 provided with an inwardly projecting tubular flange 4. v

A plurality of openings 5 is formed in the shell adjacent the end wall 2, and the wall is provided with a ring of apertures 6 surrounding the intake opening 3.

The device may be adapted to be positioned vertically or horizontally, and the housing is illustrated as positioned horizontally.

An oil pan 7 forms the support for the shell, a bracket 8 comprising a plate having an arcuate saddle-like socket 9 extending upwardly from the front end of the pan to receive the front end of the shell, and leg-like posts 10 extending upwardly from the pan adjacent the rear end of the shell, the bracket and legs being preferably welded to the shell to form a unit.

A rear end portion 11 of the pan projects rearwardly beyond the shell, and a plate 12 comprising preferably the upturned end of the extended pan bottom is bent inwardly toward the end wall 2 for supporting a tip or vaporizing plug 18 adjacent the intake opening 3.

Mounted in the shell at the open end thereof is an annular vaporizing chamber 14 comprising outer and inner cylindrical walls or tubes 15 and 16 having flanges 17 and 18 at their outer ends joined to comprise a front or outer end wall for the chamber, the inner tube having a flange 19 at its rear or inner end outbent and sealingly attached to the outer tube to provide a rear or inner wall for the chamber. I

The flange 18 of the inner tube is preferably outbent to form the outer wall of the chamber.

The flangel'? of the outer tube is preferably outbent to provide a stop ring engageable with the front end edge of the shell to limit the movement of the chamber into the shell. The Walls formed by the flanges 18 and 19 may be considered top and bottom walls respectively, of the chamber, for mounting the shell in vertical position.

The inner tube 16 is further provided with corrugations 21 for reinforcing the same, and preventing distortion when, the tubes are ex panded by heat. 7

Fixed to the chamber member and communicating with the annular chamber space within the same, are pipes 22 and 23 adapted to extend through the shell and through selected openings 6 of the wall 2. The pipes comprise respectively a liquid fuel inlet conduit having an outer end projecting beyond the rear end of the pan, anda vapor supply conduit provided with an elbow 24: at its outer end for connection of the conduit with the tip 13.

The pipes 22 and 23 are connected to the vaporizing chamber in a manner suited to a particular use of the invention to provide for flow of fuel through the chamber from the inlet pipe 22 to the vapor supply pipe 23. Fuel is admitted at a low point of the chamber to rise therein, and the vapor pipe is connected at any high point of the chamber, and at any point along the highest level in the chamber, and opposite the inlet to require the fuel to move through the entire chamber toward the outlet.

The vapor pipe 23 may extend to any desired distance through or alongside the vaporizing chamber for locating its inlet end in communication with the chamber at a high point thereof to receive fuel that has passed through the chamber. The fuel inlet pipe is let into the chamber through the inner end wall 19, and the chamber is positioned so that the point at which the inlet is connected comprises the low level of the chamber. The inlet pipe need not extend into the annular chamber, since its outlet end in said wall 19 may communicate with the lowest level of the chamber whether the same is positioned vertically or horizontally.

When the housing is to be positioned hori zontally, the axis of the annular chamber will be horizontal.

The front end of the vapor supply pipe is let into the wall 19 at a point above and diametrically opposite the end of the inlet pipe. The pipe 23 need not extend through the chamber since at any longitudinal position diametrically opposite the inlet pipe, it communicates with the top portion of the annular space through which fuel moves upwardly from the inlet.

The inner ends of the pipes 22 and 23 are flattened as at 25, and connected to the wall 19 in communicating relation with the inner end of the chamber.

The tip is preferably supported by a vertically positioned T-fitting 26 having wings 27 secured to the front plate 12, the Vapor conduit elbow being connected with the upper end of the fitting, the tip being mounted in its lateral branch, and a plug 28 being inserted in the lower branch of the fitting. The tip is thus removable and a tip having a bore of desired form and diameter may be mounted in the fitting for delivering vapor to the housing in particular uses of the burner.

A valve 29 on the outer end of the liquid supply pipe affords means for connection with a supply line 30.

A wick support or retainer 31 may be installed in the pan below the liquid fuel supply pipe to contain a wick 32 for initially heating the liquid fuel.

A shield 33 may be pivotally mounted on the rear end of the pan to cover the head end of the burner.

In using the invention, the chamber member and attached pipes comprise a unit which may be inserted in the open end of the shell, the free end of the pipes projecting through the end wall 2, and the end flange of the chamber engaging the open end edge of the shell. The vapor conduit may then be connected with the T-fitting.

The pan, shell, and chamber then comprise a unit, which may be applied to a fuel supply line, by engaging the supply pipe with the supply line for delivering fuel to the annular chamber.

The wick may be ignited for initially heatburning fuel for preheating and vaporizing the liquid fuel; the liquid being passed through the chamber in a thin sheet due to the relatively narrow spacing of the tubes forming the annular chamber.

\Vhile the openings 6 in the end wall 2 have been referred to by a single numeral and thus indicated to be similar, the selected openings through which the free ends of the pipes extend may be larger than the other openings.

The fuel conduit openings are preferably larger than the airports which are only sufficiently large to admit enough air to make a suitable mixture, but have size limited to prevent fluttering and imperfect combustion, and such size will be less than the cross sections of the fuel conduits.

lVhat I claim and desire to secure by Letters Patent is:

In an oil burner including a tubular housing, a vaporizing unit comprising an outer sleeve having a diameter to slidably engage the inner wall of the housing, an inner sleeve spaced concentrically within the outer sleeve to form an annular vaporizing chamber therebetween and having corrugations to compensate for diflerence in expansion and contraction between the outer and inner sleeves, means closing the spaces at the ends of the sleeves, inlet and outlet tubes fixed to the inner ends of the sleeves and communieating with said annular chamber, and a jet tip on the outlet pipe for discharging vaporized fuel concentrically of the inner sleeve forming the vaporizing chamber.

In testimony whereof I afiix my signature.

ROY M. SOPER. 

